Simply put, in order to go through walls via downloading, you need to have enough speed so that the hologram physically moves through said wall due to momentum from Bug 22 The easiest way to do so is by installing the aeronautics.exe's rocket upgrade, which builds enough speed to go through most doors and a lot of walls. However, if a wall is too thick, your bug will get stuck in it, and the only way out is going to the nearest printer. Some doors will block the HOP to your bug, most notably the CRS taxi port doors, and I'm not sure how to consistently get past the "No path" A similar glitch that can be used is by hovering the download hologram over something far away, then quickly swiping the cursor to a nearby wall, and downloading quickly when the holobug is inside the area you want to be in Another note is that when you are out of bounds, normal aeronautics.exe doesn't work, so you would need to rocket to move around.